On adding trivalenet impurity in a pure semiconductor the fermi level shifts very close to the ……………..band

Explanation

To solve the question regarding the shift of the Fermi level when a trivalent impurity is added to a pure semiconductor, we can follow these steps:

### Step 1: Understand the Concept of Doping
Doping is the process of adding impurities to a semiconductor to change its electrical properties. Trivalent impurities (like Boron) are added to create p-type semiconductors.

**Hint:** Remember that trivalent impurities have three valence electrons, which creates 'holes' in the semiconductor.

### Step 2: Identify the Type of Semiconductor
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